TDA8042M Datasheet, PDF (7/16 Pages) NXP Semiconductors – Quadrature demodulator

Philips Semiconductors
Quadrature demodulator
Product specification
TDA8042M
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
Oscillator
f_osc
∆f_osc
N_osc
V_osc(dis)
oscillator frequency
frequency drift
oscillator phase noise
oscillator disable voltage at pin 17
oscillator disabled
oscillator enabled
note 9
175 −
note 10
−
−
∆V_CC = ±5%
−
−
measured10 kHz −
−
from f_osc; note 11
−
−
4.0
−
325 MHz
500 kHz
100 kHz
91
dBc/Hz
1.0
V
−
V
Prescaler
V_OH
V_OL
δ
DIV_spu(IQ)
HIGH level output voltage
LOW level output voltage
output duty cycle
output spurious voltage at I and Q outputs
note 12
note 12
note 13
4.0
−
−
V
−
−
3.35 V
40
50
60
%
−
−50 −
dB
I and Q internal filters
B_−1
bandwidth for 1 dB attenuation
B_−30
bandwidth for 30 dB attenuation
30
−
−
−
450 −
MHz
MHz
I and Q output amplifiers
V_O(IQ)(DC)
V_o(IQ)(p-p)
I and Q channels DC output voltage
I and Q channels output voltage
(peak-to-peak value)
note 14
−
2.45 −
V
−
0.8
−
V
V_clip(p-p)
R_L(IQ)
R_o(IQ)
α_ct(I-Q)
I and Q output clipping level
(peak-to-peak value)
I and Q channels output load resistance
I and Q channels output resistance
crosstalk between I and Q channels
note 15
1.8
V
500 −
−
Ω
−
67
−
Ω
30
−
−
dB
Notes
1. The voltage gain control range (G_VAGC) is defined as the DC voltage to be applied on pin 3 to get a signal level of
800 mV (peak-to-peak value) at I and Q outputs.
The lowest control voltage corresponds to the highest sensitivity and gain.
2. V_th is the level of voltage to be applied at pin 20 to get a current I_det of 0.5 mA at pin 1. This voltage depends on the
amplitude of the signal at I and Q outputs.
The AGC threshold voltage can be set by a resistive voltage divider connected at pin 20. Without the external
resistors V_th is set at a value close to 2.35 V.
3. The current I_det increases when the output level (at pins 4 and 9) increases above the value set by the adjustment of
V_th.
4. The phase error is defined as the phase quadrature imbalance between I and Q channels.
5. The gain error is defined as the phase quadrature imbalance between I and Q channels.
6. The tilt is defined as the difference between the maximum and the minimum channel gain measured in a frequency
band of ±30 MHz around f_i(RF). The specified tilt is the maximum tilt value found in one of the I and Q channels.
1997 Apr 11
7